Question

Darren designed this triangular shaped entrance, ABC, to a mall.


Which expression can be used to find the distance between the points B and C of the entrance?

Answer 1

find BD first, which ratio will u use ?

Answer 2

BD is 'opposite' to 65 and AD is 'adjacent'

Answer 3

contagent

Answer 4

will tan do ?

Answer 5

so tan 65=?

Answer 6

tan 65˚
= tan (60˚ + 5˚) = (tan60˚ + tan5˚)/(1-tan60˚tan5˚)
= (sqrt(3) + tan5˚) / (1-sqrt(3).(tan5˚))